%0 Journal Article %J Estuarine, Coastal and Shelf Science %D 2020 %T Isotopic analyses, a good tool to validate models in the context of Marine Renewable Energy development and cumulative impacts %A Raoux, A. %A Pezy, J.-P. %A Ernande, B. %A Nathalie Niquil %A Dauvin, J.-C. %A Grangeré, K. %K alternative energy %K detection method %K Dieppe %K Ecopath with Ecosim %K ecosystem approach %K English Channel %K food web %K France %K Isotopic nitrogen analysis %K marine ecosystem %K model validation %K Normandie %K Offshore wind farm %K policy making %K Seine Maritime %K trophic level %K wind farm %X As part of the energy transition, the French government is planning Offshore Wind Farm (OWF) constructions in the next decades. An integrated ecosystem approach of two future OWF sites of the Eastern English Channel (Courseulles-sur-mer and Dieppe-Le Tréport) was developed to model the marine ecosystems before the OWF implementation. Such ecosystem models allow simulating the possible reef and reserve effects associated to the presence of the farm, and to character the overall changes in the food-web functioning. This holistic view of OWF effects could be replicated on other sites and form the basis of an ecosystem based management of marine renewable energies. However, to use these models for management purpose, they need to be validated. In order to do so, stable isotope ratios of nitrogen were used for determining the accuracy of the effective trophic levels computed in these two models. Results showed that trophic levels estimated by the two models were consistent with the trophic levels estimated by the independent isotopic data. In the context of OWF development and cumulative impacts analysis, this step of validation of the models is essential for developing their use by management actors and policy makers. © 2020 Elsevier Ltd %B Estuarine, Coastal and Shelf Science %V 237 %G eng %R 10.1016/j.ecss.2020.106690 %0 Journal Article %J Ecological Indicators %D 2019 %T Measuring sensitivity of two OSPAR indicators for a coastal food web model under offshore wind farm construction %A Raoux, Aurore %A Géraldine Lassalle %A Pezy, Jean-Philippe %A Samuele Tecchio %A Safi, Georges %A Ernande, Bruno %A Mazé, C. %A Le Loc'h, Francois %A Lequesne, Justine %A Girardin, Valerie %A Jean-Claude Dauvin %A Nathalie Niquil %K Barium compounds %K Bay of Seine %K coastal zone %K Ecological network analysis %K Ecopath with Ecosim %K ecosystem function %K ecosystem structure %K Ecosystems %K Electric utilities %K English Channel %K food web %K France %K in situ measurement %K Marine environment %K Marine renewable energy %K measurement method %K model %K Offshore wind farms %K Reefs %K Reserve effect %K sensitivity analysis %K trophic level %K wind farm %X A combination of modelling tools was applied to simulate the impacts of the future Courseulles-sur-mer offshore wind farm (OWF) construction (Bay of Seine, English Channel) on the ecosystem structure and functioning. To do so, food-web models of the ecosystem under three scenarios were constructed to investigate the effect caused by the OWF of added substrate (reef effect), fishing restriction (reserve effect), and their combined effect. Further, Ecological Network Analysis indices and Mean Trophic Level were derived to investigate their suitability for detecting changes in the ecosystem state. Our analysis suggests changes in the ecosystem structure and functioning after the OWF construction, the ecosystem maturity was predicted to increase, but no alterations in its overall resilience capacity. © 2018 Elsevier Ltd %B Ecological Indicators %I Elsevier B.V. %V 96 %P 728-738 %G eng %U https://www.sciencedirect.com/science/article/abs/pii/S1470160X1830534X %R 10.1016/j.ecolind.2018.07.014